Forecast's customer support is one of the best I have ever had to work with. Second would be the ease of use for staff to help plan out projects and timelines.
Filters on project pages to see only your tasks, or only certain tasks filtered by tags is neat. Nice integrations and full REST API is a nice addition.
It was worth taking the time to set up my programme properly so that I get the best from the available functionality.
Not usable on mobile devices, and disappointed by the aggressive upselling and hidden cancellation terms.
I think the feature that is missing the most is being able to see on the scheduler that the resource was already allocated with tasks in the projects.
The budget pages are a bit confusing and it's a bit tedious to update task and time entries. It's quite expensive for a large team.